ACAB isn’t just about police brutality though. Isn’t Australia’s surveillance situation pretty bad? I include that sorta stuff.
Also, assuming you aren’t yourself Aboriginal, those folks seem to feel (based on a quick web search) suppressed from speaking out about the violence and harassment they experience from Australian cops.
Australia’s freedom score is better than the US.
There are a myriad of social issues faced by First Australians (Aboriginals) including police brutality. Any summation I would try to give would be reductive given the complex history and various mitigation strategies that have occurred.
However, as I pointed out earlier it’s the prevalence of misbehavior amongst officers that determines whether it’s possible to be a police officer without passively condoning that sort of behavior.
Perhaps the behavior of Australian Police warrants the ACAB label in your view, it doesn’t in mine.